JPH03244527A - Melt-sticking method for heat shrinkable coating material - Google Patents
Melt-sticking method for heat shrinkable coating materialInfo
- Publication number
- JPH03244527A JPH03244527A JP2042980A JP4298090A JPH03244527A JP H03244527 A JPH03244527 A JP H03244527A JP 2042980 A JP2042980 A JP 2042980A JP 4298090 A JP4298090 A JP 4298090A JP H03244527 A JPH03244527 A JP H03244527A
- Authority
- JP
- Japan
- Prior art keywords
- coating material
- pipe
- outer face
- tube
- heat
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000000463 material Substances 0.000 title claims abstract description 73
- 238000000034 method Methods 0.000 title claims description 12
- 239000011248 coating agent Substances 0.000 title abstract description 44
- 238000000576 coating method Methods 0.000 title abstract description 44
- 238000010438 heat treatment Methods 0.000 claims abstract description 41
- 230000006698 induction Effects 0.000 claims abstract description 21
- 238000003466 welding Methods 0.000 claims description 9
- 239000012790 adhesive layer Substances 0.000 abstract description 11
- 239000011347 resin Substances 0.000 abstract description 5
- 229920005989 resin Polymers 0.000 abstract description 5
- 239000010410 layer Substances 0.000 abstract 1
- 229910000831 Steel Inorganic materials 0.000 description 6
- 239000010959 steel Substances 0.000 description 6
- 230000008602 contraction Effects 0.000 description 2
- 229920003020 cross-linked polyethylene Polymers 0.000 description 2
- 239000004703 cross-linked polyethylene Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 239000011247 coating layer Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000002542 deteriorative effect Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- -1 polyethylene Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C63/00—Lining or sheathing, i.e. applying preformed layers or sheathings of plastics; Apparatus therefor
- B29C63/38—Lining or sheathing, i.e. applying preformed layers or sheathings of plastics; Apparatus therefor by liberation of internal stresses
- B29C63/42—Lining or sheathing, i.e. applying preformed layers or sheathings of plastics; Apparatus therefor by liberation of internal stresses using tubular layers or sheathings
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C61/00—Shaping by liberation of internal stresses; Making preforms having internal stresses; Apparatus therefor
- B29C61/02—Thermal shrinking
- B29C61/025—Thermal shrinking for the production of hollow or tubular articles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C63/00—Lining or sheathing, i.e. applying preformed layers or sheathings of plastics; Apparatus therefor
- B29C63/0047—Preventing air-inclusions
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C63/00—Lining or sheathing, i.e. applying preformed layers or sheathings of plastics; Apparatus therefor
- B29C63/0065—Heat treatment
- B29C63/0069—Heat treatment of tubular articles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
- B29C35/02—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould
- B29C35/08—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation
- B29C35/0805—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation using electromagnetic radiation
- B29C2035/0811—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation using electromagnetic radiation using induction
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
- B29C65/18—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/01—General aspects dealing with the joint area or with the area to be joined
- B29C66/05—Particular design of joint configurations
- B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
- B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
- B29C66/112—Single lapped joints
- B29C66/1122—Single lap to lap joints, i.e. overlap joints
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
- B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
- B29C66/52—Joining tubular articles, bars or profiled elements
- B29C66/522—Joining tubular articles
- B29C66/5221—Joining tubular articles for forming coaxial connections, i.e. the tubular articles to be joined forming a zero angle relative to each other
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/80—General aspects of machine operations or constructions and parts thereof
- B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
- B29C66/814—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps
- B29C66/8145—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the constructional aspects of the pressing elements, e.g. of the welding jaws or clamps
- B29C66/81471—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the constructional aspects of the pressing elements, e.g. of the welding jaws or clamps being a wrap-around tape or band
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2023/00—Use of polyalkenes or derivatives thereof as moulding material
- B29K2023/04—Polymers of ethylene
- B29K2023/06—PE, i.e. polyethylene
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
- B29K2105/24—Condition, form or state of moulded material or of the material to be shaped crosslinked or vulcanised
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2995/00—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds
- B29K2995/0037—Other properties
- B29K2995/0049—Heat shrinkable
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2009/00—Layered products
- B29L2009/003—Layered products comprising a metal layer
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Protection Of Pipes Against Damage, Friction, And Corrosion (AREA)
- Lining Or Joining Of Plastics Or The Like (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、集中冷暖房配管、弧状錐進配管、特殊なガス
や電力配管などの管の外周に、現地や工場において熱収
縮性被覆材を溶着固定する方法に関する。[Detailed Description of the Invention] [Industrial Field of Application] The present invention applies heat-shrinkable coating materials to the outer periphery of pipes such as central heating and cooling pipes, arcuate conical pipes, special gas and power pipes, etc., on-site or in factories. This relates to a method of welding and fixing.
Ｃ従来の技術〕
従来この種の配管に、外周に樹脂被覆層を持ったライニ
ング管が使用されている。このライニング管は通常、そ
の端部を溶接接合するために裸管としており。C. Prior Art] Conventionally, this type of piping has used a lining tube having a resin coating layer on its outer periphery. This lined pipe is usually a bare pipe whose ends are joined by welding.
従って管を溶接接合した後、その接合部の裸管上に被覆
を行う必要がある。従来この被覆を行うには、バーナー
で被覆部外面を予熱し、管外面に、内面に加熱溶着性の
接着層を備えた熱収縮性被覆材（例えば熱収縮チューブ
、熱収縮シート、熱収縮テープ等）を取付け。Therefore, after welding and joining the pipes, it is necessary to coat the bare pipe at the joint. Conventionally, to perform this coating, the outer surface of the coating is preheated with a burner, and a heat-shrinkable coating material (e.g., heat-shrink tube, heat-shrink sheet, heat-shrink tape) with a heat-weldable adhesive layer on the inner surface of the tube is used. etc.) installed.
その被覆材を外面からバーナーで加熱し、収縮させて管
外面に密着させ、更にその後、再び前記被覆材をバーナ
ーで後加熱し、管外面に接触している接着層を十分昇温
、溶融させ且つ管本体も十分昇温させ被覆材の管に対す
る接着を完全にするという方法が取られていた。The coating material is heated from the outside with a burner to cause it to shrink and adhere tightly to the outside surface of the tube.Furthermore, the coating material is then heated again with a burner to sufficiently raise the temperature and melt the adhesive layer in contact with the outside surface of the tube. In addition, a method was used in which the temperature of the tube body was raised sufficiently to ensure complete adhesion of the coating material to the tube.
しかし、かかる方法では被覆材を管に対して強固に接着
するための管の予熱及び後加熱は、バーナーで局部的な
加熱を行いながら、全体を加熱するので、全体を均一な
所望の温度に加熱することが困難であり１作業に熟練を
要するという問題があった。また、後加熱を被覆材外面
からバーナーで行っているため、熱伝導の悪い被覆材を
通してその内面の接着層及び管本体を加熱しなければな
らず、加熱に時間がかかったり、また、高温の炎によっ
て被覆材を劣化させる等の問題があった。However, in this method, the preheating and post-heating of the tube in order to firmly bond the coating material to the tube involves heating the entire tube while locally heating it with a burner, so the entire tube is heated to a uniform desired temperature. There was a problem in that it was difficult to heat and required skill for each operation. In addition, since post-heating is performed from the outside of the sheathing material using a burner, the adhesive layer on the inside of the sheathing material and the tube body must be heated through the sheathing material, which has poor thermal conductivity. There were problems such as the flames deteriorating the coating material.
本発明はかかる問題点に鑑みてなされたもので、熱収縮
して管外面に密着した被覆材と管外面との接触部を敏速
に且つ熟練を要することなく均一に加熱して被覆材を良
好に管外面に溶着させることの可能な熱収縮性被覆材の
溶着方法を提供することを目的とする。The present invention has been made in view of the above problems, and it is possible to quickly and uniformly heat the contact area between the heat-shrinkable covering material and the outer surface of the pipe without requiring any skill, thereby improving the quality of the covering material. It is an object of the present invention to provide a method for welding a heat-shrinkable coating material that can be welded to the outer surface of a pipe.
本発明は１熱収縮性被覆材を管外面に取付け、その被覆
材を外面から加熱して収縮させて管外面に密着させ、そ
の後、該被覆材内側の管を誘導加熱により加熱し、被覆
材と管外面とを溶着させることを特徴とする熱収縮性被
覆材の溶着方法を要旨とする。The present invention includes (1) attaching a heat-shrinkable sheathing material to the outer surface of the tube, heating the sheathing material from the outside to shrink it and bringing it into close contact with the outside surface of the tube; then, heating the tube inside the sheathing material by induction heating; The gist of the present invention is a method for welding a heat-shrinkable covering material, which is characterized by welding the outer surface of the pipe and the outer surface of the pipe.
以下９図面を参照して本発明の詳細な説明する。The present invention will be described in detail below with reference to nine drawings.
第１図は本発明方法によって被覆すべき管の１例を示す
断面図であり、ｌは鋼管等の管、２はその上に予め形成
されていた樹脂皮膜９例えばポリエチレン皮膜３は溶接
接合部である。管１の外周面は被覆材を良好に接着しう
るように清浄にされている。また、必要に応し適当なプ
ライマーを塗布しておいてもよい。まず管１の外面に熱
収縮性被覆材４を取付ける。ここで使用する被覆材４と
しては、チューブの形態であってもよいし、或いはシー
ト状、テープ状等であってもよい。FIG. 1 is a cross-sectional view showing one example of a pipe to be coated by the method of the present invention, where l is a pipe such as a steel pipe, 2 is a resin film 9 previously formed thereon, for example, a polyethylene film 3 is a welded joint. It is. The outer circumferential surface of the tube 1 is cleaned to allow good adhesion of the coating material. Further, an appropriate primer may be applied if necessary. First, a heat-shrinkable covering material 4 is attached to the outer surface of the tube 1. The covering material 4 used here may be in the form of a tube, or may be in the form of a sheet, tape, or the like.
チューブの形態の被覆材４を用いる場合には、そのチュ
ーブを単に管ｌにはめるのみでよい。シート状或いはテ
ープ状の被覆材を用いる場合には、シート或いはテープ
を管１に巻き付ける。When using the covering material 4 in the form of a tube, it is sufficient to simply fit the tube into the pipe 1. When using a sheet-like or tape-like covering material, the sheet or tape is wrapped around the pipe 1.
熱収縮性被覆材４の材料としては、熱収縮性の樹脂材料
を適宜選択して使用でき１例えば、架橋ポリエチレンを
挙げることができる。被覆材４の内面には加熱溶融性樹
脂からなる接着層が設けられている。As the material for the heat-shrinkable covering material 4, heat-shrinkable resin materials can be selected and used as appropriate, and examples thereof include crosslinked polyethylene. An adhesive layer made of heat-melting resin is provided on the inner surface of the covering material 4.
次に、管外面に取付けた被覆材４を外面からバーナー等
で加熱し熱収縮させる。これにより、被覆材４は第２図
に示すように管１の外面及び皮膜２の外面に密着する。Next, the covering material 4 attached to the outer surface of the tube is heated from the outer surface with a burner or the like to cause thermal contraction. As a result, the covering material 4 is brought into close contact with the outer surface of the tube 1 and the outer surface of the coating 2, as shown in FIG.
この時、被覆材４の中央から加熱を行い中央部から収縮
を行わせると、管外面と被覆材４との間に気泡を閉じ込
むことがないので好ましい、また、必要に応じローラが
けなどを行って気泡を排出してもよい。At this time, it is preferable to heat the coating material 4 from the center and cause the contraction to occur from the center, since air bubbles will not be trapped between the outer surface of the tube and the coating material 4. Also, if necessary, applying rollers, etc. You can remove the air bubbles.
被覆材４を管１外面に密着させた後、第３図に示すよう
に、被覆材４全体の外側に誘導加熱コイル５を配置し、
管１を誘導加熱する。これにより、管１自体が発熱し、
管１の外面に接触している被覆材４の最内層の接着層も
加熱される。かくして、被覆材４の接着層が管１の外面
に溶着し被覆材４と管１との強固な接着が確保される。After the sheathing material 4 is brought into close contact with the outer surface of the pipe 1, as shown in FIG. 3, an induction heating coil 5 is placed outside the entire sheathing material 4,
Tube 1 is heated by induction. As a result, the tube 1 itself generates heat,
The innermost adhesive layer of the covering material 4 which is in contact with the outer surface of the tube 1 is also heated. In this way, the adhesive layer of the sheathing material 4 is welded to the outer surface of the tube 1, and strong adhesion between the sheathing material 4 and the tube 1 is ensured.
ここで、誘導加熱コイル５への印加電流、印加電圧、印
加時間等を制御することにより、管１外面の温度を容易
に所望温度に制御することができ。Here, by controlling the applied current, applied voltage, applied time, etc. to the induction heating coil 5, the temperature of the outer surface of the tube 1 can be easily controlled to a desired temperature.
被覆材４の接着層と管ｌの外面との接触部を容易に所望
温度に昇温して良好な接着を得ることができる。The contact portion between the adhesive layer of the covering material 4 and the outer surface of the pipe 1 can be easily heated to a desired temperature to obtain good adhesion.
なお、被覆材４と皮膜２との接触部も、管ｌの発熱によ
り皮膜２を通して加熱されるので、互いに接着すること
ができる。ただし、管１から皮膜２を介して加熱される
ため、他の部分に比べて若干昇温か遅い。そこで、この
部分の加熱を補助するため、補助加熱手段を使用しても
よい。補助加熱手段としては９例えば。Note that the contact portion between the covering material 4 and the coating 2 is also heated through the coating 2 due to the heat generated by the tube 1, so that they can be bonded to each other. However, since it is heated from the tube 1 through the coating 2, the heating temperature is slightly slower than in other parts. Therefore, an auxiliary heating means may be used to assist in heating this portion. For example, 9 is used as an auxiliary heating means.
第３図に二点類ｖＡ６で示すように被覆材４外面に取付
けるリボンヒーター、熱板ヒーター等を挙げることがで
きる。Examples include a ribbon heater, a hot plate heater, etc., which are attached to the outer surface of the covering material 4, as shown by two points vA6 in FIG.
第３図において、誘導加熱コイル５は、管１の被覆材４
で被覆した部分全体を同時に加熱しろる長さのものを示
したが１本発明に使用する誘導加熱コイル５は図示のも
のに限らず、管１の狭い環状部分を加熱しうる短いもの
でもよい。そのような誘導加熱コイルを使用する際には
、その誘導加熱コイルを管ｌに沿って適当な速さで移動
させればよい。In FIG. 3, the induction heating coil 5
The induction heating coil 5 used in the present invention is not limited to the one shown, but may be short enough to heat a narrow annular portion of the tube 1. . When using such an induction heating coil, it is sufficient to move the induction heating coil along the pipe 1 at an appropriate speed.
上記したように本発明は被覆材を管外面に熱収縮させて
密着させた後、管１自体を誘導加熱により加熱する構成
であるので、昇温した管外面によってその管外面に密着
した被覆材内面の接着層を加熱、昇温でき。As described above, the present invention has a structure in which the tube 1 itself is heated by induction heating after the coating material is heat-shrinked to the outer surface of the tube and brought into close contact with the outer surface of the tube. The adhesive layer on the inner surface can be heated to raise its temperature.
被覆材を管外面に溶着できる。この際、加熱温度、加熱
速度は誘導加熱コイルへの印加電流、印加電圧、印加時
間等で調整できるので、容易に且つ敏速に所望温度とす
ることができ、熟練者でなくても容易に良好な接着を行
うことができる。また、被覆材４の外面から被覆材を通
して加熱するものではないので、バーナー加熱のような
被覆材表面の劣化を生じない。The coating material can be welded to the outer surface of the pipe. At this time, the heating temperature and heating rate can be adjusted by adjusting the applied current, applied voltage, applied time, etc. to the induction heating coil, so the desired temperature can be easily and quickly achieved, and even non-experts can easily achieve the desired temperature. Adhesion can be performed. Further, since heating is not performed through the coating material from the outer surface of the coating material 4, the surface of the coating material does not deteriorate as would occur when heating with a burner.
７５０Ａの鋼管に、内径８５０ｍ、厚み１．５ｎのチュ
ーブ状の被覆材（本体材質、架橋ポリエチレン。A 750A steel pipe with a tubular covering material with an inner diameter of 850m and a thickness of 1.5n (main body material: cross-linked polyethylene).
内面にホントメルト系の接着層０．６ ｍｓあり）をか
ぶせ。Cover the inner surface with a true melt adhesive layer (0.6 ms long).
バーナーで加熱することにより、収縮させ鋼管外面に密
着させた。次に、その周囲に、専用のサポートを備えた
半割り構造の誘導加熱コイルをセットし、１誘導加熱コ
イルに、６０Ｖ、５００Ａの電流を流し、鋼管の誘導加
勢を行った。約ＩＯ分で鋼管は９０〜１００℃に昇温し
、被覆材の外面も約８０℃に昇温した。その後、電気を
切り、冷却した。By heating with a burner, it was contracted and brought into close contact with the outer surface of the steel pipe. Next, a halved induction heating coil with a dedicated support was set around it, and a current of 60V and 500A was passed through one induction heating coil to induce induction force on the steel pipe. The temperature of the steel pipe rose to 90 to 100°C in about IO minutes, and the temperature of the outer surface of the coating material also rose to about 80°C. Then, the electricity was turned off and the mixture was allowed to cool.
その結果、被覆材は軸方向に約５％収縮したが鋼管外面
に良好に接着したライニング皮膜となった。この皮膜の
接着力を測定したところ、約１０ｋｇ／ｅｌｌ（ピール
テスト）であった。As a result, the coating material shrunk by about 5% in the axial direction, but the lining film adhered well to the outer surface of the steel pipe. The adhesive strength of this film was measured and was approximately 10 kg/ell (peel test).
以上のように本発明方法は、被覆材を熱収縮させて管外
面に密着させた後、その管自体を誘導加熱するものであ
るので、管自体の発熱によって被覆材と管外面との接触
部を加熱し良好な接着を得ることができる。As described above, the method of the present invention heat-shrinks the sheathing material so as to bring it into close contact with the outside surface of the tube, and then heats the tube itself by induction. can be heated to obtain good adhesion.
また、管本体より加熱するので、ノ＼−ナー加熱のよう
な被覆材表面の劣化はなく、高品質の皮膜を形成できる
。更に、管の加熱に際しては、誘導加熱コイルをセット
して電流を流せばよく、操作が簡単であり、しかも加熱
温度、加熱速度等は電気的に管理できるので容易に所望
温度とすることができ、Ｐ練者でなくても一定品質に施
工することができる。In addition, since heating is performed from the tube body, there is no deterioration of the surface of the coating material as would be the case with nozzle heating, and a high-quality coating can be formed. Furthermore, when heating the tube, all you have to do is set up an induction heating coil and apply a current, making it easy to operate.Furthermore, the heating temperature, heating rate, etc. can be controlled electrically, making it easy to reach the desired temperature. , P Even if you are not an expert, you can perform construction to a certain quality.
図面は管の溶接接合部に被覆材を本発明方法によって溶
着する方法を説明するもので、第１図は被覆材を管外面
に取付けた状態を示す断面図、第２図はその被覆材を熱
収縮させて管外面に密着させた状態を示す断面図、第３
図はその管を誘導加熱する状態を示す断面図である。
１−管、２−皮膜、３−溶接接合部、４−被覆材。
５ 誘導加熱コイル、６−リボンヒーター又は熱板ヒー
ターThe drawings explain the method of welding a coating material to a welded joint of a pipe by the method of the present invention. Figure 1 is a sectional view showing the coating material attached to the outer surface of the pipe, and Figure 2 is a cross-sectional view showing the coating material attached to the outer surface of the pipe. Cross-sectional view showing a state in which the tube is heat-shrinked and brought into close contact with the outer surface of the tube, No. 3
The figure is a sectional view showing a state in which the tube is heated by induction. 1-pipe, 2-coating, 3-welded joint, 4-covering material. 5. Induction heating coil, 6. Ribbon heater or hot plate heater.
Claims (1)
ら加熱して収縮させて管外面に密着させ、その後、該被
覆材内側の管を誘導加熱により加熱し、被覆材と管外面
とを溶着させることを特徴とする熱収縮性被覆材の溶着
方法。A heat-shrinkable sheathing material is attached to the outside surface of the tube, and the sheathing material is heated from the outside to shrink and adhere tightly to the outside surface of the tube.Then, the tube inside the sheathing material is heated by induction heating to bond the sheathing material and the outside surface of the tube. A method for welding a heat-shrinkable covering material, the method comprising welding a heat-shrinkable covering material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2042980A JPH03244527A (en) | 1990-02-23 | 1990-02-23 | Melt-sticking method for heat shrinkable coating material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2042980A JPH03244527A (en) | 1990-02-23 | 1990-02-23 | Melt-sticking method for heat shrinkable coating material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03244527A true JPH03244527A (en) | 1991-10-31 |
Family
ID=12651185
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2042980A Pending JPH03244527A (en) | 1990-02-23 | 1990-02-23 | Melt-sticking method for heat shrinkable coating material |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03244527A (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1999038669A1 (en) * | 1998-01-28 | 1999-08-05 | Uponor Innovation Ab | Method of joining plastics pipes by heat fusion |
| WO2000022334A1 (en) * | 1998-10-09 | 2000-04-20 | Sekisui Chemical Co., Ltd. | Composite high-pressure pipe and method of joining same |
| US6059908A (en) * | 1993-10-27 | 2000-05-09 | Nv Raychem Sa | Method for protecting substrates |
| JP2001260224A (en) * | 2000-03-17 | 2001-09-25 | Dai Ichi High Frequency Co Ltd | Method for increasing bonding strength of thermally shrunk coating |
| WO2002053343A1 (en) * | 2000-12-15 | 2002-07-11 | Shawcor Ltd. | Method for inductively heating a substrate and a coating on said substrate |
| WO2002030653A3 (en) * | 2000-10-10 | 2002-10-03 | Shawcor Ltd | Method of applying heat activatable covering |
| JP2004130669A (en) * | 2002-10-10 | 2004-04-30 | Dai Ichi High Frequency Co Ltd | Method of producing multiple layer-coated curved metal pipe |
| US10566757B2 (en) | 2016-12-09 | 2020-02-18 | Lear Corporation | Method of heat shrinking a protective sleeve onto an electrical connection |
| US20220170547A1 (en) * | 2019-03-29 | 2022-06-02 | Abb Schweiz Ag | Joint, Motor, Industrial Robot And Method Of Installing A Seal |
-
1990
- 1990-02-23 JP JP2042980A patent/JPH03244527A/en active Pending
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6059908A (en) * | 1993-10-27 | 2000-05-09 | Nv Raychem Sa | Method for protecting substrates |
| WO1999038669A1 (en) * | 1998-01-28 | 1999-08-05 | Uponor Innovation Ab | Method of joining plastics pipes by heat fusion |
| WO2000022334A1 (en) * | 1998-10-09 | 2000-04-20 | Sekisui Chemical Co., Ltd. | Composite high-pressure pipe and method of joining same |
| US6629547B1 (en) * | 1998-10-09 | 2003-10-07 | Sekisui Chemical Co., Ltd. | Composite high-pressure pipe and method of joining same |
| US7094310B2 (en) | 1998-10-09 | 2006-08-22 | Sekisui Chemical Co., Ltd. | Method for joining high-pressure composite pipes |
| JP2001260224A (en) * | 2000-03-17 | 2001-09-25 | Dai Ichi High Frequency Co Ltd | Method for increasing bonding strength of thermally shrunk coating |
| WO2002030653A3 (en) * | 2000-10-10 | 2002-10-03 | Shawcor Ltd | Method of applying heat activatable covering |
| WO2002053343A1 (en) * | 2000-12-15 | 2002-07-11 | Shawcor Ltd. | Method for inductively heating a substrate and a coating on said substrate |
| US7012227B2 (en) | 2000-12-15 | 2006-03-14 | Shawcor, Ltd. | Method for applying or repairing a coating on a substrate by inductive heating |
| JP2004130669A (en) * | 2002-10-10 | 2004-04-30 | Dai Ichi High Frequency Co Ltd | Method of producing multiple layer-coated curved metal pipe |
| US10566757B2 (en) | 2016-12-09 | 2020-02-18 | Lear Corporation | Method of heat shrinking a protective sleeve onto an electrical connection |
| US20220170547A1 (en) * | 2019-03-29 | 2022-06-02 | Abb Schweiz Ag | Joint, Motor, Industrial Robot And Method Of Installing A Seal |
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